Patent US2775262A successfully refreshed from Google Patents.
US2775262A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Semi-steel reinforced concrete pipe
Assignee: Individual
•
Filing: 1953-06-26
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Granted: 1956-12-25
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Expires: 1973-06-26
Abstract
No abstract record available.
Inventors
- 👤 William E Wread
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-30 15:04
CPC Classifications
F; F16; F16L; F16L25/00; F16L25/0027; F16L9/00; F16L9/08
Claims Analysis
Total Claims: 0
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References Cited (Backward Citations)
US823346A
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US958043A
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US1027565A
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US1443162A
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US1804888A
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US2569612A
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US2318112A
Cited
US2660199A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1959-12-25 | 1960-06-25 | 1960-12-25 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1963-12-25 | 1964-06-25 | 1964-12-25 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1967-12-25 | 1968-06-25 | 1968-12-25 | $7700.00 | Window Closed / Lapsed |